Having quality ceiling insulation is of significant benefit to poultry producers year round. During cold weather, hot air produced by the brooders, furnaces and the birds quickly rises towards the ceiling. If the ceiling is not properly insulated, this valuable heat will pass through it, resulting in lower house temperatures and higher heating costs. Conversely, during summertime, ceiling insulation keeps the amount of heat entering the house through the ceiling to a minimum. On a hot summer day..., attic temperatures in dropped-ceiling houses can easily exceed 130oF. If a ceiling is not properly insulated, heat from the attic space will enter the house, leading to higher house temperatures and lower bird performance.